Slovakia retired its MiGs. The American replacements had not arrived.

Spare-parts and sustainment problems pushed Slovakia to ground its MiG-29s while delayed F-16s were still years away. Poland and the Czech Republic supplied interim air policing. This is the dangerous middle of every fleet transition: the old supplier becomes unreliable before the new system becomes operational.

An ally can cover the gap. It cannot pretend the gap was not there.

For Slovakia, the maintenance contract can ground what the sales contract delivered.

On paper, possession of the aircraft, vehicle or weapon is treated as proof of usable strength. In practice, maintenance crews, diagnostic tools, repair approvals, contractor access, payments and the flow of ordinary spare parts can decide whether the capability arrives, works and remains available. That is the control point hiding behind the headline fact: Slovakia retired its MiGs.

The most dangerous failures are often deniable. A component is unavailable, an approval takes longer than expected or another customer becomes urgent. Each explanation can be reasonable. Together they can reduce availability month by month until an impressive inventory becomes a line of grounded equipment. For Slovakia, the warning is captured by what followed: The American replacements had not arrived.

Do not ask whether the supplier is friendly. Ask questions that can be evidenced. Which sealed units must go back to the original manufacturer? How many months of mission critical spares are held in-country? Can another approved company take over maintenance?

Doing every repair at home would be wasteful. Some foreign support is sensible. The mistake is allowing one inaccessible contractor, tool or approval to determine whether the whole fleet flies. That distinction matters here: The American replacements had not arrived.

There is also a timing problem. The alternative supplier, component or service may exist, but it may need qualification, integration, training and fresh political approval. Those months count. A substitute that becomes usable after the crisis is over is not a substitute. It is an explanation for the inquiry that follows. The exercise has a concrete starting point in this case: Slovakia retired its MiGs.

Finally, ask what happens under pressure. What software, manuals and test equipment leave with the contractor? How quickly does fleet availability fall after foreign support stops? Which failures can your own technicians diagnose and repair? A contingency that has never been funded, integrated or exercised is only optimism with a heading. The first half of this headline, 'Slovakia retired its MiGs', is where that test begins.

Price that exposure honestly. A cheaper bid with one unmanageable control point may be more expensive than a higher bid that preserves options. Acquisition teams are good at comparing purchase prices. They are less consistent at pricing the cost of a grounded fleet, an empty magazine or a capability that arrives after the political need has passed. The headline fact, 'Slovakia retired its MiGs', should carry that exposure in its score.

This is where the procurement team earns its keep. It can secure manuals, tools and legal repair rights, train national teams to diagnose faults rather than merely replace boxes and hold critical spares against a realistic interruption period. A penalty clause may recover money later. These measures protect capability now.

The final test for Slovakia is simple: how many aircraft, vehicles or weapons can actually deploy after six months without foreign contractor support? If the honest answer begins with 'provided that somebody else agrees', that condition belongs on the first page of the procurement decision, not in an annex nobody reads.

A grounded fleet still appears in the national inventory. It just does not appear over the battlefield when it is needed. The maintenance contract can exercise more control than the original sales contract. That risk is easy to miss when the announcement stops at 'Slovakia retired its MiGs'.